int strutil_isTextFile(const char *path) {
FILE_STREAM_T fs;
int rc = 0;
unsigned char buf[256];
size_t sz;
size_t idx;
FILE_OFFSET_T fSize;
if(OpenMediaReadOnly(&fs, path) != 0) {
return 0;
}
fSize = fs.size;
while(fs.offset < fSize) {
sz = sizeof(buf);
if(fs.offset + sz > fSize) {
sz = (size_t) (fSize - fs.offset);
}
if(ReadFileStream(&fs, buf, sz) != sz) {
break;
}
// Simply check if the file is a text file
for(idx = 0; idx < sz; idx++) {
//if(!isascii(buf[idx])) {
if(!avc_istextchar(buf[idx])) {
CloseMediaFile(&fs);
return 0;
}
}
if(fs.offset == fSize) {
rc = 1;
}
}
CloseMediaFile(&fs);
return rc;
}
int metafile_isvalidFile(const char *path) {
FILE_STREAM_T fs;
int rc = 0;
unsigned char buf[128];
struct stat st;
size_t sz;
size_t idx;
int is_nl = 0;
FILE_OFFSET_T fSize;
if(!path) {
return 0;
}
if(fileops_stat(path, &st) != 0 || (st.st_mode & S_IFDIR)) {
return 0;
}
if(OpenMediaReadOnly(&fs, path) != 0) {
return 0;
}
if((fSize = fs.size) > METAFILE_FILE_CHK_SZMAX) {
fSize = METAFILE_FILE_CHK_SZMAX;
}
while(fs.offset < fSize && rc != 1) {
sz = sizeof(buf);
if(fs.offset + sz > fSize) {
sz = (size_t) (fSize - fs.offset);
}
if(ReadFileStream(&fs, buf, sz) != sz) {
break;
}
for(idx = 0; idx < sz; idx++) {
if(!avc_istextchar(buf[idx])) {
CloseMediaFile(&fs);
return 0;
}
if(buf[idx] == '\n') {
is_nl = 1;
} else {
if(is_nl) {
if(!memcmp(&buf[idx], METAFILE_KEY_FILE, strlen(METAFILE_KEY_FILE)) ||
!memcmp(&buf[idx], METAFILE_KEY_DEVICE, strlen(METAFILE_KEY_DEVICE)) ||
!memcmp(&buf[idx], METAFILE_KEY_TITLE, strlen(METAFILE_KEY_TITLE)) ||
!memcmp(&buf[idx], METAFILE_KEY_DESCRIPTION, strlen(METAFILE_KEY_DESCRIPTION)) ||
!memcmp(&buf[idx], METAFILE_KEY_IGNORE, strlen(METAFILE_KEY_IGNORE)) ||
!memcmp(&buf[idx], METAFILE_KEY_RTMP_PROXY, strlen(METAFILE_KEY_RTMP_PROXY)) ||
!memcmp(&buf[idx], METAFILE_KEY_RTSP_PROXY, strlen(METAFILE_KEY_RTSP_PROXY)) ||
!memcmp(&buf[idx], METAFILE_KEY_HTTP_PROXY, strlen(METAFILE_KEY_HTTP_PROXY)) ||
!memcmp(&buf[idx], METAFILE_KEY_METHODS, strlen(METAFILE_KEY_METHODS)) ||
!memcmp(&buf[idx], METAFILE_KEY_TOKEN, strlen(METAFILE_KEY_TOKEN)) ||
!memcmp(&buf[idx], METAFILE_KEY_XCODEARGS, strlen(METAFILE_KEY_XCODEARGS))) {
rc = 1;
break;
}
}
is_nl = 0;
}
}
}
CloseMediaFile(&fs);
return rc;
}